Jean bergmann



NOV. 15, 1927. 1,649,379

J. BERGMANN CALCULATING MECHANI SM Filed Oct. 11, 1924 Fifizfiu 8 6 mi IJUUUDDD 5 Figflo F j Fig.5. 1 FigfL h i Inventor:

a BMW Wa 1m Patented Nov. 15, 1927.

UNITED STATES,

1,649,379 PATENT OFFICE.

' man BEBGMANN, or wannsnn NEAR BERLIN, GERMANY.

CALCULATING MECHANISM.

Application filed. October 11, 1924, Serial No. 743,120, and in Germany October 9, 1923.

This invention relates to calculating mechanisms, and particularly to those of the type in which a series of figure slides are adjusted by means of a stylus. Such a device is shown in my Patent No. 1,567,564.

One object of the present invent-ion is to provide control members in conjunction with the figure slides whereby the numbers set up will be indicated, and will also be set up on a printing device.

Another object is to so arrange the control members that they will be operated by the stylus as it moves the figure slides and so that they can also be moved independently of the figure slides, whereby the final result of a computation can be set up on the print ing device.

One embodiment of my invention is shown by way of example in the accompanying drawing, wherein Fig. 1 is a plan view of the device with parts broken away for better disclosure of the underlying parts,

Fig. 2 is a cross section on the line 2-2 of Fig. 1,

Fig. 3 is a detail view of a guide element which bears one of the figure slides Fig. 4 is a cross section through the same,

Fig. 5 is a bottom View of one end of said guide element, and

Fig. 6 is a vertical section on the line 6-b of Fig. 1.

The machine comprises a series of figure slides 1 corresponding to the number of places required for computation. The slides are mounted on guide elements a as indicatcd in Fig. 6, being secured thereto by means of hooks stamped out of the slides The guides a are guided in slots 3) of an intermediate plate 0.

Guides (0 have at their ends double T shaped heads f, each of which has two long transverse arms 9 and two short transverse arms it. The short transverse arms are adapted to pass through lateral slots (Z of which engage in grooves of the guides a.

shifting the slides. A single series of numbers from 0 to 9 is arranged on each slide 1, the numbers being spaced in accordance with the spaces 2. At the side of certain of the spaces 2 are colored marks 3 for a purpose to be presently described.

Above each slide 1 is arranged a control slide 5 having apertures 6, which are Wide enough to disclose the colored marks 3 on slides 1. The control slides are provided with two series of numbers from 0 to 9, one above the other, as shown at the slide farthest to the right in Fig. 1.

Cover plates 7 and 7 are arranged over the control and figure slides in such a way as to leave an open space through which the slides are operated. The results of the computation are read through holes 4 in plate 7 through which the numbers of the figure slides are visible.

Upon a stationary transverse shaft 14 are rotatably mounted a number of type wheels 14 correspondingto the number of control slides 5. Each type wheel has secured to it a gear 13 which is engaged by a toothed flange 12 of the corresponding control slide. A hood 1 L guards the type Wheels. The type wheels are adapted to print on a record strip in a manner which will be described later.

In the opposite ends of the casing in which the slides are mounted are a pair of transverse bars 8 and 9 adapted when moved toward each other to abut against the opposite ends of the control slides to return to normal position any control slides which have been displaced. The bars 8 and 9 are moved toward each. other by means of toggles consisting of the bars 11. The bars 11 on each side are pivoted to each other at 10*, while their outer ends are pivoted to the ends of the bars 8 and 9. By grasping the handles 10 secured to bars'll and pulling outwardly the toggles are broken and the bars 8 and 9 moved toward each other.

From the structure which has been described so far itwill be seen that if a stylus is inserted in the hole opposite the numeral 4- 0f the second slide from the right and moved down until the stylus strikes against cover 7 the slides will assume the position in which they are shown in Fig. 1. The figure 4 of the number slide appears in the window at, and the number 4: of the control slide appears just above the edge of the cover plate 7. The handles 10 are now pulled outward and the control slide is returned to normal position by the bar 9. If a 2 is to be added to the 1 the stylus will be inserted in the hole of the control slide opposite the figure 2. The figure slide will thereby be moved. down 2 spaces so that the number 6 will appear in the window 4i while the number 2 of the control slide will be seen just above the edge of plate 7. The number added will therefore be indicated each time as a check upon the operation.

In order to transfer 1 to the next higher column when the number added gives a. result greater than the following structure is provided:

A series of short axles n are mounted in a row across the intermediate plate 0 just below the lower'edge of plate 7. On the lower ends of the axles are small gears 72 adapted. to engage racks i of guides 11. On the upper ends of the axles are mounted four toothed star wheels 0. The gear engages the rack on the guide to the left of it while the toothof the star wheel which extends to the right lies under the teeth 2 of the figure slide to the right.

Assuming a 1 to be showing in the window l second from the right, and the control slide to be in normal position, if a 7 is to be added in this column, a colored mark 3 will appear in the hole 6 opposite the number 7, indicating that the stylus is to be moved up instead of down. The stylus is therefore moved up until it strikes the edge of plate 7, which moves the figure slide up three spaces bringing a 1 into the window 4;, which, however, will be obscured by the upper end of the control slide until the latter is returned to normal position. By the up ward movement of the control slide the number T of the lower series will be brought into position just above the edge of plate 7. During the last part of the upward movement of the stylus it will rotate the star wheel 0, thereby moving the ligurc slide 1 to the left down one space so that the figure 1. appears in the window 1. A spring m cooperating with notches y' of the guide a insures the movement of the slides for a full space. A. transverse bar as is arranged for cooperation with the figure slides to return them to zero position.

The mechanism tor adjusting the type wheels has already been described. Adjacent the type wheels is mounted a shittablc carriage 15 having a pad 16 over which is guided a record strip 17. The record strip is fed from a .roll 18 and is unwound by a second roll 19. A toothed wheel 20 secured to the roll 19 is adapted to cooperate with a toothed member 22 to rotate the roll 19 for unwinding the record strip. A spring pressed pawl 21 permits rotation of the roll 19 in only one direction. The member 22 is shittably mounted and is urged by a spring, not shown, into contact with toothed wheel 20. A spring 24 normally holds the carriage away from the ype wheels. To print, the carriage is pushed against the type wheels by pressing on flange 25. During the inward moven'ient oi? the carriage the teeth of wheel 20 slide over teeth 22 which moves down against the action of its spring. On the return movement. the teeth 22 rotate wheel 20 and therewith roll 19, drawing the record strip along to bring another space into printing position. lVhen the individual items have been printed, the final result can be set up on the type wheels lior printing by moving the control slides independently in accordance with the figures read from the windows 4.

I claim:

1. In a ,:alculating mechanism having figure slid-es movable alternatively in either longitudinal direction in carrying out a single kind of *alculation, said figure slides being recessed in conformity with the figure arrangement,and means indicating the direction for moving the slides during a calculation, said tigure slides being adapted to be actuated by a stylus selectively inserted .in said recesses, control slides arranged above said ligurc slides, said control slides having recesses adapted to register with the recesses of said figure slides, and a plurality oi" series of figures on said control slides running in the same direction as tho tigures on the figure slides, and means for returning said control slides to starting position from either longitudinal direction.

A calculating mechanism in accordance with claim 1 in which the means for returning the control slides to starting position comprises a pair of transverse bars spaced from the opposite ends of the control slides, and means for moving said transverse bars toward each other.

3. A. calculating machine comprising rccc. led figure slides, indicating devices, recessed control slides adjacent said figure slides and operatively engaging said indicating devices to position said devices as the control slides are moved, the corresponding tigure and control slides being adapted to be simultaneously operated by suitable means selectively inserted in recesses in said "slides.

The foregoing specification signed at Ben lin this second day of October, 1924.

J EAN BERGMAN N.

Hill 

